I have a large northern breed bitch that has just had her second season, their was only 3 months between her first and second season. she came in season around 4 weeks ago, i have just checked her now to make sure she isnt still bleeding before letting her out with the males and noticed she is loosing some milky white discharge. Is this normal as i have never seen it before :s

I think it is a good idea to take her to the vets.  Could be an infection.